Plow with snubber attachment



Sept 29, 1953 w. T. GRAHAM 2,653,532

PLOW WITH SNUBBER ATTACHMENT Filed NOv. l2, 1948 Cttomegs Patented Sept. 29,1953

asassg. :grow WrrH sNUBBEn arfrncniuENr William Graham, Amarilla Texelapiiatos Noyember 12, 19.48?. Seial N9- sans 3 claims (ci. :a1- 1981) l This invention relates to plows of the type illustratedin the Noel-1l etal. Patent No'. 2,029,249, January', 1936,' wherein ground working tools are carried 'from the plow. frame by` shanks that entend' rearwardly off'the frame members and curve downwardlyand forwardly to carry ground working tools ina position to form alternate ridges and furrows. When such plows are. oper; ating in exceedingly. hard? ground or in elds having stones, roots 'or/other obstructions, there is a tendency to spring` the frame. members on which the Shanks. arev attached.

Therefore', the principal objects of. the invention are to provide the frame members. with overv load springs or. snubbers that. are supported in position to retain action of the. Shanks within thev elasticv limits. ofthe portions or the frame members to which the. Shanks are directly at-k tached and distribute the. thrusts to. the upper portions ot said members.

In accomplishing. these and other objects. f. the vinvention hereinafter, pointed out, Iv have provided improved structure, the preferred forms of which are illustrated in the accompanying drawing wherein; y

Fig. l is a perspective View of a transverse frame member. of a plow and a tool carrying shank equipped with an overload or. snubbing spring in accordance with the present invention. Eig. 2 is a fragmentary side elevational View.

Fig. 3 is a fragmentary central section.

Eig. 4 is a perspective view. of a modified view of the invention.

Referring more in detail to the drawings:

l designates Voneof the transverse members of a plow frame usually of I-beam shape and arranged with the web Zvertical and the flanges 3 and "4 horizontal so that a tool carrying. shank 5 is adapted to be attached transversely to the lower. ange 4 by. means of a clamp 6.

The resilient shank includes a substantially straight forward portion l extending. under the lower flange 4 and a downwardly and forwardly curving rear portion 8 carrying a ground working tool such as a chisel 3. The shank is formed of.

bar. Astock of sufficient width and thickness to provide the required strength and'provide bearling contact of the upper. flat face l0 with the underface H of the I-b'eam flange 4 as shownV in Fig. 1

The clamp 6 is substantiallyv rigid and includes a plate portion 1.2l having a through recess [3; ofsubstantially the cross sectional'shape of the' forward portion 'of theshank to accommodate the shank therein.vv The sides of `the plate'pfor` tion on the respective sides of the recess [3. 'rather closely underlie thefa'ce Il of the flange `and carry transverse flanges I4 and. I5"that loverlie the upper faces l and I1 ofthe lower flange '4 onthe respectivesides. 'of the web 2 as shown in Figs2and3.

Mounted in threaded openings [8. and [9. of the plate portion ofthe clamp are set screws. and 2i that are adapted to apply clamping. pres`` sure. on the underface of. the shank and draw. the clamping anges I4 and l5 against the flanges of the. I-beam'and the upperk face. of the shank against the underface I .I of the I-'beam as shown in' Fig. 3. When the clamp is thus` engaged the shank is. rigidlyk connected with. the I.beam and when the plowy is used in hard ground or fields having obstructions; the forces acting on ythe Shanks tend to spring. the lower flange of the I-beam. "i

To overcome this difficulty the upper. flange 3 carries an overload or snubber spring 22 of 'at spring leaf material to provide substantially at upper and lower faces 23 and 24 to be respectively engaged between an anchoring clamp 25 and the flat upper face 26.l of theflange 3.' The spring may. he of substantially the same. width as the plow shank and of a length to provide a straight portion 21 which extends across the frame member in substantially parallel relation with the straight portion of the beam shank and a rearwardly downwardly curved portion 28 terminating in a reversely curved foot lportion 29 that is adapted to bea'r lightly upon the upper face f the shank when the spring is rigidly secured by the clamp, the Vvcurvature of the foot bin'g suf cient to maintain desired bearing. contact upon movement of the shank. The clamp 25` may be of the same construction as the clamp previously described in that it comprises aplate portion 33 having a' transverse passageway 3|to accommodate the forward end of the spring and s'ideporitions 32 and 33 which closely overlie theup'per face of the flange 3. The side portions B'an'd 33 carry transverse flanges 34'and' '35 'thatl ngage the underfaces 36 and 31 of the flange 3 as shown in Fig. 3. The straight portion of the spring 22 is retained in clamping contact with the upper face of the flange and the flanges 34 and 35 in contact with the underface of the flanges by clamping devices 38 and 39 similar to the set screws previously described. If desired, the forward ends of the shank and spring which project beyond the clamps may be interconnected by a tie bolt that extends through suitable openings Iii and 42 in the ends of the spring and shank respectively.

In order to facilitate mounting of the clamps on the I-beam, they may be split transversely and provided with ears 43-44 and l5-46 that are drawn together by fastening devices 4l and 48.

In applying the snubber spring, the sections composing the upper clamp are applied to the upper iange 3 and secured together by the bolts 47 and 28. The overload or snubber springs are then applied by sliding the forward ends through the recesses of the clamps as shown in Fig. Y3 and set screws 33 and 39 tightened to secure the spring in rigid contact with the upper flange of the supporting member of the frame. When in this position the rounded face i9 of the foot bears lightly on the upper face of the plow shank. Therefore, when the plow shank meets on obstruction or the action becomes too great tending to distort the lower flange, the overload or snubber spring comes into play and not only yieldingly resists or dampens the pumping action, but distributes the forces to the upper flange through the clamp so that the upper flange cooperates with the lower flange in resisting forces that previously tended to distort the lower flange. This arrangement not only controls action of the resilient plow shank but also enhances attachnient and reinforces the supporting member' of the frame so as to prevent distortion and failure thereof.

In Fig. 4 is illustrated a modified form of snubbing spring in the form of a continuous bar 5t that extends across two or more of the transverse members 5l, 52 and 53 of the plow frame. In this form the bar secured diagonally of the frame by clamps 54, each comprising an upper bar 55 that extends across the upper face of the snubbing bar and a lower bar extending across the underface of the under flanges as shown in Fig. 4. The bars are drawn toward each other to retain the snubber in contact with the upper faces of the iianges by fastening devices such as bolts 5E which extend through suitable openings in the respee 've ends of the clamping bars. rEhe snubber bar has a snubbing portion 5'! at the outer end similar to the portions 28 and 29 of the snubber spring previously described and intermediate portions of the bars have depending portions and 5% that are adapted to bear upon the next laterally adjacent plow Shanks that are connected with the transverse members and 53 as shown in Fig. 4. In this form of the invention, the action is substantially the same as the action of the overload or snubber springs previously described, however, the snubbing action is carried out by means of a single member.

From the foregoing it is obvious that I have provided an overload or snubbing spring that is adapted to act upon the plow shanks so as to limit tendency for the supporting members of a frame to be distorted and to distribute the thrust to all of the beam iianges.

What I claim and desire to secure by Letters Patent is:

l. In a plow, a frame having a transverse I- beam member provided with upper and lower' flanges, a ground working tool having a shank portion extending transversely of the lower flange of the I-beam member, clamp means engaging the lower iiange of the I-beam and shank portion for rigidly securing said shank portion to said I-beam member, a snubber having a shank portion extending transversely of the upper flange of the I-beam member and a downwardly and rearwardly extending portion in bearing contact with the shank of the ground working tool in rearwardly spaced relation to the I-beam member, clamp means engaging the upper flange of the I-beam member and shank portion of the snubber for rigidly securing said snubber shank portion to the upper flange of the I-bearn member, and means tying the Shanks together on the forward side of the I-beam member whereby forces applied by the ground working tool are partially distributed by the snubber to the upper portion of the I-beam member to reduce the tendency of said forces to bend the lower flange of the I-beam member.

2. In a plow, a frame having a transverse I- beam member provided with upper and lower flanges, a clamp on the lower I-beam flange, said clamp having a plate portion engaging the outer face of said lower flange of the I-beam member and provided with ilanges engaging faces of the I-beam flange opposite the face engaged by the plate portion, said clamp having a channel shaped way extending transversely of the I-beam member, a ground working tool having a shank portion extending through the way of the lower clamp, means carried by the clamp and having bearing contact with said shank portion of the ground working tool for urging the shank in clamping contact with the lower iange of the I-beam member and said flanges of the clamp into engagement with the I-beam flange to rigidly support said shank, a snubber having a shank portion extending transversely of the upper iiange of the I-beam member and a downwardly and rearwardly extending portion in bearing Contact with the shank of the ground working tool in rearwardly spaced relation to the I-beam member, clamp means engaging the upper flange of the I-beam member and shank portion of the snubber for rigidly securing said snubber shank portion to the upper iiange of the I-beam member, and means tying the Shanks together on the forward side of the I-beam member whereby forces applied by the ground working tool are partially distributed by the snubber and tying means to the upper portion of the I-beam member to reduce the tendency of said forces to bend the lower iange of the I-beam member.

3. In a plow, a frame having a transverse I- beam member provided with upper and lower flanges, reversely arranged clamps on the upper and lower I-beam flanges, said clamps each having a plate portion engaging a respective outer face of a ange of the I-beam member and provided with flanges engaging faces of the I-beam flanges opposite the faces engaged by the plate portions, said clamps having channel shaped ways extending transversely of the I-beain member, a ground working tool having a shank portion extending through the way of the lower clamp, a snubber having a shank portion extending through the way of the upper clamp and a downwardly and rearwardly extending portion in bearing contact with the shank of the ground working tool in rearwardly spaced relation to the I-beam member, set screws carried by the clamps and having bearing contact with said shank portions of the ground working tool and snubber respectively for urging the shanks in clamping contact with the anges of the I-beam member and said anges of the clamps into engagement with the I-beam flanges to rigidly support said Shanks, and means tying the shank portions together on the forward side of the I-beam member whereby forces applied by the ground working tool are partially distributed by the snubber and tying means to the upper portion of the I-beam member to reduce the tendency of said :forces to bend the lower flange of the I-beam member.

WILLIAM T. GRAHAM.

References Cited in the file of this patent- UNITED STATES PATENTS Number 15 Number Name Date Waterbury et a1. Nov. 27, 1877 Cook Jan. 4, 1887 McKenzie Mar. 8, 1887 Reid Aug. 9, 1887 Bateman Dec. 29, 1903 Kendig et al. July 18, 1905 Gooding Aug. 20, 1918 Hellman Nov. 16, 1920 Noell et a1. Jan. 28, 1936 FOREIGN PATENTS Country Date Australia Dec. 4, 1928 

